>It should be a 352...430's were not put in TBirds till 1959.
A few were made and had major differences. Does your 58 engine look like this? Some of these have been found. Is so, you are one lucky Bird owner!!!
1 of a few.
Photo by FORD MOTOR COMPANY
>1960 HT 390, Edelbrock Performer RPM Intake, Shorty Headers,
>2-1/2" Exhaust and 3.70 Rear Gears